Environment Canada has confirmed a tornado touched down near Clifford.
The weather agency says the first tornado of the season occurred around 3:30 PM on Wednesday.
Officials say tornado winds topped out at 170 kilometres an hour and it was about three and a half kilometres long and up to 200 metres wide.
A number of trees and the corner of a barn were damaged as well as a car in the area.
Grain bins were also ripped off their cement bases, but no one was seriously hurt.
It is the earliest recorded tornado in Ontario history.
Strong winds are also blamed for a tree that fell on a house in Flesherton on Wednesday morning.
It sparked a small fire damaged the home, but no one was hurt.